The Codebreakers: The true story of the secret intelligence team that changed the course of the First World War by James WyllieEnglish | 4 Jun. 2015 | ISBN: 0091957729 | 352 Pages | EPUB/AZW3/PDF (conv) | 10.44 MB

While battalions hunkered down in the mud of western France, anti-aircraft guns took aim at zeppelins floating over the capital, and Atlantic convoys tried desperately to evade German U-boats, another, more secret battle was underway.